Radio Shack EC-4027

Datasheet legend
Ab/c: Fractions calculation
AC: Alternating current
BaseN: Number base calculations
Card: Magnetic card storage
Cmem: Continuous memory
Cond: Conditional execution
Const: Scientific constants
Cplx: Complex number arithmetic
DC: Direct current
Eqlib: Equation library
Exp: Exponential/logarithmic functions
Fin: Financial functions
Grph: Graphing capability
Hyp: Hyperbolic functions
Ind: Indirect addressing
Intg: Numerical integration
Jump: Unconditional jump (GOTO)
Lbl: Program labels
LCD: Liquid Crystal Display
LED: Light-Emitting Diode
Li-ion: Lithium-ion rechargeable battery
Lreg: Linear regression (2-variable statistics)
mA: Milliamperes of current
Mtrx: Matrix support
NiCd: Nickel-Cadmium rechargeable battery
NiMH: Nickel-metal-hydrite rechargeable battery
Prnt: Printer
RTC: Real-time clock
Sdev: Standard deviation (1-variable statistics)
Solv: Equation solver
Subr: Subroutine call capability
Symb: Symbolic computing
Tape: Magnetic tape storage
Trig: Trigonometric functions
Units: Unit conversions
VAC: Volts AC
VDC: Volts DC
Years of production:   Display type: Numeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×3"×½" Display size: 10+2 digits
Weight: 4 oz    
    Entry method: Formula entry 
Batteries: 2×"LR44" button cell Advanced functions: Trig Exp Hyp Lreg Ab/c Cmem 
External power:   Memory functions: +/- 
I/O:      
    Programming model: Formula programming 
Precision: 12 digits Program functions: Cond  
Memories: 6 numbers Program display: Formula display  
Program memory: 40 program steps Program editing: Formula entry  
Chipset: Sharp EL-5020   Forensic result:  

ec4027.jpg (25458 bytes)No question about it; the EC-4027 calculator is none other but the Sharp EL-5020 in disguise. Not exactly a surprise, given that all Radio Shack calculators are OEM versions of popular models from manufacturers like Casio, Sharp, or Texas Instruments. However, sometimes it's surprisingly difficult to find the original model. Not in this case, however; since I already had an EL-5020 in my possession, it was easy to tell that there was no functional difference between the two machines.